Do all camels have humps?

Apart from the species of camel already mentioned, there are four other member of the camel family which do not possess humps. These are the Llama, Guanaco, Alpaca and vicuna, all from South America. From the time of Inca civilization these animals have been domesticated by man, and to this day they are invaluable to Indians living at high altitudes. They are used mainly as beasts of burden and will happily bear loads of up to 100 pounds in weight if properly handled. A Llama that is annoyed will spit in the face of the offender with great accuracy.